constraints

Hallo !

I 've got an external application, which sends strings (numbers (6)) into the database, 8i. The row ist varchar (7).
The client-application behind the database only allow integer strings. But sometimes it happens that the input contains letters. How can I make a constraint, who filters the output from the external application, to avoid an input of letters ?

Tschüß, Jan! Received on Fri Aug 04 2000 - 00:00:00 CDT